package fuxi02_finally.test_collection;

import Jichen.Bird.Main;

import java.util.TreeMap;

public class TreeMapDemo {
    public static void main(String[] args) {
        TreeMap<String, Integer> treeMap = new TreeMap<>();
        treeMap.put("a",1);
        treeMap.put("b",2);
        System.out.println(treeMap);
    }
}
